Fundamental Parameters of the Two Hall-of-Famers HD 189733 and HD 209458

HD 189733 and HD 209458 are two of the most thoroughly studied exoplanet systems. They also represent the only transiting systems for which spectroscopy studies have produced radial velocity signatures of both the planets and the parent stars, yielding direct mass measurements. We present the results of our interferometric radius measurements and spectrophotometric observations of these two hall-of-fame exoplanet hosts. Our results, combined with trigonometric parallaxes and literature broad-band photometry, yield empirical values for stellar and planetary radii and stellar effective temperatures and luminosities. Using the directly determined component masses from previous studies, we calculate surface gravities and bulk densities for the parent stars and their exoplanets, creating a nearly model-independent set of fundamental astrophysical parameters for two of exoplanet science's most important stepping stones.